Electric hoist.



No. 818,078. PATENTED APR. 17, 1906.

P. J. DARLINGTON. ELECTRIC HOIST.

APPLICATION FILED DIS-0.19. 1904.

Zl/dimiaes: liar/672552: @yi flair) fjmh 57714 PATENTED APR. 17

P. J. DARLINGTON.

ELECTRIC HOIST.

APPLICATION FILED 13110.19, 1904.

2 SHEETSSHEET 2 Mum z frde razor! full '0 fkz iz' PHILIP J. DARLINGTON,OF CHICAGO, ILLINOIS.

ELECTREO HOIST.

Specification of Letters Patent.

Patented April 17, 1906.

Application filed December 19,1904. Serial No. 237.425.

I!) all whom zit may concern:

Be it known that I, PHILIP J. DARLINGTON, a'citizen of the UnitedStates, residing at Chi- ('ago, in the county of Cook and State ofIllinois, have invented a certain new and useful improvement in ElectricHoists, of which the following is a full, clear, concise, and exactdescription.

My invention relates to electric hoists, and has for its object toprovide an improved structure which will be compact and efficient inoperation with which the maximum amount of power may be obtained, whilethe minimum amount of head-room is occupied.

My invention consists, broadly, of an electric hoist having ahoisting-drum with a suitable housirg or frame therefor, together with amotor mounted outside the housing upon one of the end walls thereof andhaving a shaft extending within the housing external to the drum, thedrum and motor shafts being connected by reduction-gearing mounted onthe other end wall of the housing. An. electric hoist so corstructed andassembled will occupy the greatest amount of space in a horizontaldirection or in the direction of its width or length, so that its heightor amount of head-room will be made small.

Other featureslof the invention. relate to the manner. of supporting themotor-shaft.

and reduction-gearing to the means for controlling a load retainingclutch and to the construction of the hoist-frame or housing, whereby itmay support trolley-wheels at its sides or top, as desired, in order touse the hoist with tracks of different type.

I will describe my invention particularly by reference to theaccompanying drawings, wherein Figure 1 is a vertical sectional view ofan electric hoist embodying my invention, and Fig. 2 is an end viewthereof.

The same letters of reference indicate like parts wherever used.

The hoistingdruma, which is adapted to wind up the cable to lift a loadcarried by the hook a, is mounted in a housing or frame I), thehorizontal shaft a of the drum being j ournaled in the vertical endwalls of the housing. A motor 0 is mounted on the outside of the housingon one of the end walls thereof, the shaft 0 of the motor extendingwithin and through the housing external to the drum (1 and beingconnected with the drum-shaft a by reduction-gearing G, placed at theend of the housing opposite the motor 0. Preferably the gearing ismounted on the outer surface of the end wall of the housing opposite thewall supporting the motor, being protected by a cover Z), secured tosaid first-mentioned'wall. Said gearing may comprise a pinion d, rigidlymounted upon the motorshaft and meshing with a gear-wheel d, screwedupon a threaded shell d carrying a pinion. (1 the shell being looselymounted upon the drum-shaft. The pinion d meshes with a gear (1 looselymounted upon the motorshaft and rigidly secured to a pinion d alsoloosely mounted upon the motor-shaft and meshing with a gear d,rigidlymounted upon the drum-shaft. The motor-shaft c is journaled in aquill 6, supported by the housing or frame. A number of thereductiongear members are rotatably mounted upon said quill'as, forexample, gear (1 and pinion d which forms a convenient support therefor.

A load-retaining friction-ratchet brake is provided and comprises aratchet-wheel f, loosely mounted upon the shell d between an annularcollar 9, rigidly secured to the shell and the laterally-projecting sideof the gear d,which is loosely screwed upon the threaded shell. Theoperation of the brake is controlled by a spring-actuated pawl 72,engaging the teeth of said ratchet-wheel f, the pawl being mounted uponthe cover 12', preferably upon the inner surface thereof. As the drum isrotated in a direction to lift the load carried by the cable the pawl hslips over the teeth of the ratchet f, but when the movement is reversedfor lowering the load, if the motor exerts suflicient effort, the geard, mounted upon the screw-threaded portion of the shell d draws away,thus freeing the ratchet-wheel f, allowing said ratchet-wheel to remainstationary during the descent of the load. In case of the load tendingto drive the motor, however, the gear (1 binds against the ratchetwheelf, locking it-securely between the collar g and the gear (1, and saidratchet being thus locked and held against rotation by thespring-actuated pawl h will prevent a lowering movement of the drum.

The frame or housing is so constructed as to support trolley-wheels atits sides or top, as desired, so that the hoist may be employed withtracks formed by a single rail located above the hoist or trackscomprising two rails located on opposite sides of the hoist, as shown indotted lines in Fig. 2. As shown, the housing carries upon its top orcrown a pair of trolley-supporting brackets and may be provided withtrolley-supports upon its side walls, which may consist of a pair oftrolley-shafts passing through both side Walls and supported thereby.With this arrangement the trolley-wheels may be mounted either upon thebrackets or side sup orts, as desired. A motor i may be carrie by theframe to drive the trolley-wheels upon the tracks.

I claim 1. In an electric hoist, the combination with a hoisting-drum,of a housing therefor in the end walls whereof the horizontal drumshaftis journaled, a motor mounted outside the housing upon one of the endwalls thereof with its shaft passing through the housing external to thedrum, and reduction-gearing supported on the other end wall of thehousing and connecting the drum and motor shafts; whereby a powerfulhoist is obtained occupying small head-room.

2. In an electric hoist, the combination with a hoisting-drum, of ahousing for said drum in the walls whereof the shaft of the drum isjournaled, a motormounted on the outside of the housing with its shaftextending therein external to the drum, a guill supported by the housingin which sa'i shaft is journaled, and reduction-gearing supported at oneend of said drum and connecting the drum and motor shafts, a portion ofsaid geafling being rotatably mounted upon said ui I q 3. In an electrichoist, the combination with a hoisting-drum, of a housing therefor, amotor carried by the housing for driving said drum, and trolley-wheelsprovided with supports, the sides and to of said housing being adaptedto carry sai supports; Whereby the hoist may be interchangeably employedupon overhead and side tracks.

4. In an electric hoist, the combination with a hoisting-drum, of ahousing therefor, in the vertical walls whereof the drum-shaft isjournaled, a motor on the outside of said housing with its shaftextending therein, re-

duction-gearing mounted u on the outer surface of one of said end wal sand connecting the drum and motor shafts, a cover for said end wall, aload-retaining friction and ratchet brake, associated with thehoistingdrum and motor, and a spring-actuated pawl mounted upon the saidcover and controlling said brake.

5. In an electric hoist, the combination with a hoisting-drum, of ahousing therefor, a motor carried by the housing for driving said drum,trolley-wheels and tracks there.

therefor, and supports carried upon the sides of said housing or frameadapted to support said Wheels.

7. In an electric'hoist, the combination with a hoisting-drum, of ahousing therefor, in the vertical end wallswhereof the drumshaft isjournaled, a motor mounted on the outside of the frame with its shaftextending therein external to the drum, reduction-gearing supported atone end of the drum, said gearing connecting the drum and motor shafts,and trolley-wheels with their supports, the top and sides of saidhousing being adapted to carry said sup orts.

In witness whereof I iereunto subscribe my name this 16th day ofDecember, A. D.

PHILIP J. DARLINGTON. Witnesses:

WINFIELD W. LEAcH, IRVING IVIAODONALD.

